Maddox said the fire was similar to the others in that the exterior of the house was set on fire. Other fires were reported at homes on Christor Place, North Hampton Avenue, Park Lake Street, Lake Highland Drive and North Hill Avenue.

Most fires have been lit in the crawl space of the home and have happened between 10 p.m and 2 a.m., said Orlando City Commissioner Patty Sheehan.

The state fire marshal's office is investigating the downtown Orlando fires and five other suspicious fires in and around the historic district of Sanford. Authorities on Monday said the Sanford and Orlando fires have similarities, but declined to say what those were.

On July 3, Sanford's historic Little Red School House was destroyed in a fire that investigators called arson. There were suspicious fires both before and after the one at the school house that could be related, officials have said.

Anyone with information on the fires is asked to call the Crimeline at 1-800-423-TIPS1-800-423-TIPS.